3595970
Description
Flashcards by Jack Smith, updated more than 1 year ago
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Created by Jack Smith
about 9 years ago
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| Question | Answer |
| What does the nucleus contain? | Protons and Electrons |
| What are the differences between the three particles (weight and charge) | Protons - Heavy and have a positive charge Neutrons - Heavy and neutral (no charge) Electrons are tiny and have a negative charge. |
| What is the name of the top and bottom number of each element and what does it tell you? | Top - MASS NUMBER - Total number of protons and neutrons. Bottom - ATOMIC NUMBER - Number of protons in the atom. |
| What are Isotopes? | They are different atomic forms of the same element, which have the same number of protons but a different number of neutrons. |
| What is an Ion? | A charged particle that is formed when an atom gains of loses and electron. |
| How did Mendeleev arrange his table of elements? | He arranged it in order of increasing atomic mass. |
| Name the 3 Transition Metals | Copper Iron Lead |
| Name the 3 Alkali Metals. | Lithium Sodium Potassium |
| Name the 4 Halogens. | Fluorine Chlorine Bromine Iodine |
| Name the 6 noble gases. | Helium Neon Argon Krypton Xenon Radon |
| What do all noble gases have in common? | They all have a full outer shell of electrons this means they are un reactive. |
| What is relative atomic mass? | Its the weighted average of all the isotopes in a sample. |
| Give properties of a giant covalent compound | Solid at room temperature High Melting/Boiling Points Strong covalent bonds between atoms. Do not conduct electricity (except graphite) Insoluble in water |
| Give properties of a simple covalent compound | Gases and liquids at room temp Low Melting/Boiling Points Weak intermolecular forces between molecules Do not conduct electricity Soluble in water. |
| Why can graphite conduct electricity? | They have weak intermolecular forces between layers allows layers to slide over eachother. It conducts electricity due to spare electrons which are free to move between the layers. |
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